Project 1 - Interfacing a 16*2 LCD with Arduino using I2C protocol

#include <LiquidCrystal.h>

LiquidCrystal lcd(12 ,11 ,5 ,4 ,3 ,2); //Define LCD Module Pins (RS,RN,D4,D5,D6,D7)
int window[10] = {0}; // Creating a integer array of 10 element.
int signalPin = 7; // connected signal pin of sensor to pin No.7 of Ardunio
long duration; // Time
long cm; // Centimeters
long inch; // Inches
void setup()
{
Serial.begin(9600);// Initialize serial communication:
lcd.begin(16, 2); // Initialize LCD
}

void loop()
{
pinMode(signalPin, OUTPUT); // Enble pin 7 as output
digitalWrite(signalPin, LOW); // clearing previous data
delayMicroseconds(2); // Micro seconds delay
digitalWrite(signalPin, HIGH); // Triggered by a HIGH pulse
delayMicroseconds(10); // Micro seconds delay
digitalWrite(signalPin, LOW); // Again low

// The same pin is used to read the signal from the PING))):

pinMode(signalPin,INPUT); // Enble pin 7 as input
duration = pulseIn(signalPin,HIGH); //a HIGH pulse duration is the time (in microseconds
cm = duration * 0.0346/2; // conversion
inch = duration * 0.01348/2; // conversion
lcd.setCursor(0, 0); // Setting cursor of LCD
lcd.print(" >>Distance<<"); // Printing this message
lcd.setCursor(0, 1); // Again setting cursor
lcd.print(cm); // Printing converted value i.e. 'Time into Centimeters'
lcd.print(" cm ");
lcd.print(inch);// Printing converted value i.e. 'Time into Inhes'
lcd.print(" inch");

// Now smoothen the sensor data
int current_samp = 0;
current_samp = (duration); // duration = current_samp
delayMicroseconds(300); // taking delay
pushVal(current_samp);// calling function
Serial.println(takeAvg()); // calling function
}

void pushVal(int val)
{
int i = 0;
for(i = 1;i < 10; i++)// This for loop run for 10 time
{
window[i-1] = window[i]; // here setting window previous value as window new value
}
window[10 - 1] = val; // finally giving to val
}

int takeAvg() // this funtion is just taking simple avg of 10 element
{
int i = 0;
long sum = 0;
for(i = 0; i < 10; i++) // This for loop is adding 10 element
{
sum += window[i]; //in each cycle sum value is incressing
}
return (sum / 10); // dividing sum with number of element i.e. '10'.